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V4L/DVB (9365): adding lgdt3304 based driver
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lgdt3304.c:
    frontend driver for the lgdt3304 chip, this driver is not compatible
    with the lgdt330x.

Signed-off-by: Markus Rechberger <mrechberger@sundtek.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Markus Rechberger authored and Mauro Carvalho Chehab committed Dec 29, 2008
1 parent aa56cb9 commit 67ea14f
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7 changes: 7 additions & 0 deletions drivers/media/video/empia/lgdt3304/Makefile
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lgdt3304-demod-objs := lgdt3304.o

obj-m += lgdt3304-demod.o

EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
EXTRA_CFLAGS += -Idrivers/media/dvb/frontends
EXTRA_CFLAGS += -DCONFIG_DVB_LGDT3304
378 changes: 378 additions & 0 deletions drivers/media/video/empia/lgdt3304/lgdt3304.c
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/*
* Driver for LG ATSC lgdt3304 driver
*
* Copyright (C) 2008 Markus Rechberger <mrechberger@sundtek.de>
*
*/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>
#include "dvb_frontend.h"
#include "lgdt3304.h"

static unsigned int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug,"lgdt3304 debugging (default off)");

#define dprintk(fmt, args...) if (debug) do {\
printk("lgdt3304 debug: " fmt, ##args); } while (0)

struct lgdt3304_state
{
struct dvb_frontend frontend;
fe_modulation_t current_modulation;
__u32 snr;
__u32 current_frequency;
__u8 addr;
struct i2c_adapter *i2c;
};

static int i2c_write_demod_bytes (struct dvb_frontend *fe, __u8 *buf, int len)
{
struct lgdt3304_state *state = fe->demodulator_priv;
struct i2c_msg i2cmsgs = {
.addr = state->addr,
.flags = 0,
.len = 3,
.buf = buf
};
int i;
int err;

for (i=0; i<len-1; i+=3){
if((err = i2c_transfer(state->i2c, &i2cmsgs, 1))<0) {
printk("%s i2c_transfer error %d\n", __FUNCTION__, err);
if (err < 0)
return err;
else
return -EREMOTEIO;
}
i2cmsgs.buf += 3;
}
return 0;
}

static int lgdt3304_i2c_read_reg(struct dvb_frontend *fe, unsigned int reg)
{
struct lgdt3304_state *state = fe->demodulator_priv;
struct i2c_msg i2cmsgs[2];
int ret;
__u8 buf;

__u8 regbuf[2] = { reg>>8, reg&0xff };

i2cmsgs[0].addr = state->addr;
i2cmsgs[0].flags = 0;
i2cmsgs[0].len = 2;
i2cmsgs[0].buf = regbuf;

i2cmsgs[1].addr = state->addr;
i2cmsgs[1].flags = I2C_M_RD;
i2cmsgs[1].len = 1;
i2cmsgs[1].buf = &buf;

if((ret = i2c_transfer(state->i2c, i2cmsgs, 2))<0) {
printk("%s i2c_transfer error %d\n", __FUNCTION__, ret);
return ret;
}

return buf;
}

static int lgdt3304_i2c_write_reg(struct dvb_frontend *fe, int reg, int val)
{
struct lgdt3304_state *state = fe->demodulator_priv;
char buffer[3] = { reg>>8, reg&0xff, val };
int ret;

struct i2c_msg i2cmsgs = {
.addr = state->addr,
.flags = 0,
.len = 3,
.buf=buffer
};
ret = i2c_transfer(state->i2c, &i2cmsgs, 1);
if (ret != 1) {
printk("%s i2c_transfer error %d\n", __FUNCTION__, ret);
return ret;
}

return 0;
}


static int lgdt3304_soft_Reset(struct dvb_frontend *fe)
{
lgdt3304_i2c_write_reg(fe, 0x0002, 0x9a);
lgdt3304_i2c_write_reg(fe, 0x0002, 0x9b);
mdelay(200);
return 0;
}

static int lgdt3304_set_parameters(struct dvb_frontend *fe, struct dvb_frontend_parameters *param) {
int err = 0;

static __u8 lgdt3304_vsb8_data[] = {
/* 16bit , 8bit */
/* regs , val */
0x00, 0x00, 0x02,
0x00, 0x00, 0x13,
0x00, 0x0d, 0x02,
0x00, 0x0e, 0x02,
0x00, 0x12, 0x32,
0x00, 0x13, 0xc4,
0x01, 0x12, 0x17,
0x01, 0x13, 0x15,
0x01, 0x14, 0x18,
0x01, 0x15, 0xff,
0x01, 0x16, 0x2c,
0x02, 0x14, 0x67,
0x02, 0x24, 0x8d,
0x04, 0x27, 0x12,
0x04, 0x28, 0x4f,
0x03, 0x08, 0x80,
0x03, 0x09, 0x00,
0x03, 0x0d, 0x00,
0x03, 0x0e, 0x1c,
0x03, 0x14, 0xe1,
0x05, 0x0e, 0x5b,
};

/* not yet tested .. */
static __u8 lgdt3304_qam64_data[] = {
/* 16bit , 8bit */
/* regs , val */
0x00, 0x00, 0x18,
0x00, 0x0d, 0x02,
//0x00, 0x0e, 0x02,
0x00, 0x12, 0x2a,
0x00, 0x13, 0x00,
0x03, 0x14, 0xe3,
0x03, 0x0e, 0x1c,
0x03, 0x08, 0x66,
0x03, 0x09, 0x66,
0x03, 0x0a, 0x08,
0x03, 0x0b, 0x9b,
0x05, 0x0e, 0x5b,
};


/* tested with KWorld a340 */
static __u8 lgdt3304_qam256_data[] = {
/* 16bit , 8bit */
/* regs , val */
0x00, 0x00, 0x01, //0x19,
0x00, 0x12, 0x2a,
0x00, 0x13, 0x80,
0x00, 0x0d, 0x02,
0x03, 0x14, 0xe3,

0x03, 0x0e, 0x1c,
0x03, 0x08, 0x66,
0x03, 0x09, 0x66,
0x03, 0x0a, 0x08,
0x03, 0x0b, 0x9b,

0x03, 0x0d, 0x14,
//0x05, 0x0e, 0x5b,
0x01, 0x06, 0x4a,
0x01, 0x07, 0x3d,
0x01, 0x08, 0x70,
0x01, 0x09, 0xa3,

0x05, 0x04, 0xfd,

0x00, 0x0d, 0x82,

0x05, 0x0e, 0x5b,

0x05, 0x0e, 0x5b,

0x00, 0x02, 0x9a,

0x00, 0x02, 0x9b,

0x00, 0x00, 0x01,
0x00, 0x12, 0x2a,
0x00, 0x13, 0x80,
0x00, 0x0d, 0x02,
0x03, 0x14, 0xe3,

0x03, 0x0e, 0x1c,
0x03, 0x08, 0x66,
0x03, 0x09, 0x66,
0x03, 0x0a, 0x08,
0x03, 0x0b, 0x9b,

0x03, 0x0d, 0x14,
0x01, 0x06, 0x4a,
0x01, 0x07, 0x3d,
0x01, 0x08, 0x70,
0x01, 0x09, 0xa3,

0x05, 0x04, 0xfd,

0x00, 0x0d, 0x82,

0x05, 0x0e, 0x5b,
};

struct lgdt3304_state *state = fe->demodulator_priv;
if (state->current_modulation != param->u.vsb.modulation) {
switch(param->u.vsb.modulation) {
case VSB_8:
err = i2c_write_demod_bytes(fe, lgdt3304_vsb8_data,
sizeof(lgdt3304_vsb8_data));
break;
case QAM_64:
err = i2c_write_demod_bytes(fe, lgdt3304_qam64_data,
sizeof(lgdt3304_qam64_data));
break;
case QAM_256:
err = i2c_write_demod_bytes(fe, lgdt3304_qam256_data,
sizeof(lgdt3304_qam256_data));
break;
default:
break;
}

if (err) {
printk("%s error setting modulation\n", __FUNCTION__);
} else {
state->current_modulation = param->u.vsb.modulation;
}
}
state->current_frequency = param->frequency;

lgdt3304_soft_Reset(fe);


if (fe->ops.tuner_ops.set_params)
fe->ops.tuner_ops.set_params(fe, param);

return 0;
}

static int lgdt3304_init(struct dvb_frontend *fe) {
return 0;
}

static int lgdt3304_sleep(struct dvb_frontend *fe) {
return 0;
}


static int lgdt3304_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct lgdt3304_state *state = fe->demodulator_priv;
int r011d;
int qam_lck;

*status = 0;
dprintk("lgdt read status\n");

r011d = lgdt3304_i2c_read_reg(fe, 0x011d);

dprintk("%02x\n", r011d);

switch(state->current_modulation) {
case VSB_8:
if (r011d & 0x80) {
dprintk("VSB Locked\n");
*status |= FE_HAS_CARRIER;
*status |= FE_HAS_LOCK;
*status |= FE_HAS_SYNC;
*status |= FE_HAS_SIGNAL;
}
break;
case QAM_64:
case QAM_256:
qam_lck = r011d & 0x7;
switch(qam_lck) {
case 0x0: dprintk("Unlock\n");
break;
case 0x4: dprintk("1st Lock in acquisition state\n");
break;
case 0x6: dprintk("2nd Lock in acquisition state\n");
break;
case 0x7: dprintk("Final Lock in good reception state\n");
*status |= FE_HAS_CARRIER;
*status |= FE_HAS_LOCK;
*status |= FE_HAS_SYNC;
*status |= FE_HAS_SIGNAL;
break;
}
break;
default:
printk("%s unhandled modulation\n", __FUNCTION__);
}


return 0;
}

static int lgdt3304_read_ber(struct dvb_frontend *fe, __u32 *ber)
{
dprintk("read ber\n");
return 0;
}

static int lgdt3304_read_snr(struct dvb_frontend *fe, __u16 *snr)
{
dprintk("read snr\n");
return 0;
}

static int lgdt3304_read_ucblocks(struct dvb_frontend *fe, __u32 *ucblocks)
{
dprintk("read ucblocks\n");
return 0;
}

static void lgdt3304_release(struct dvb_frontend *fe)
{
struct lgdt3304_state *state = (struct lgdt3304_state *)fe->demodulator_priv;
kfree(state);
}

static struct dvb_frontend_ops demod_lgdt3304={
.info = {
.name = "LG 3304",
.type = FE_ATSC,
.frequency_min = 54000000,
.frequency_max = 858000000,
.frequency_stepsize = 62500,
.symbol_rate_min = 5056941,
.symbol_rate_max = 10762000,
.caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
},
.init = lgdt3304_init,
.sleep = lgdt3304_sleep,
.set_frontend = lgdt3304_set_parameters,
.read_snr = lgdt3304_read_snr,
.read_ber = lgdt3304_read_ber,
.read_status = lgdt3304_read_status,
.read_ucblocks = lgdt3304_read_ucblocks,
.release = lgdt3304_release,
};

struct dvb_frontend* lgdt3304_attach(const struct lgdt3304_config *config,
struct i2c_adapter *i2c)
{

struct lgdt3304_state *state;
state = kzalloc(sizeof(struct lgdt3304_state), GFP_KERNEL);
memset(state, 0x0, sizeof(struct lgdt3304_state));
state->addr = config->i2c_address;
state->i2c = i2c;

memcpy(&state->frontend.ops, &demod_lgdt3304, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
}

EXPORT_SYMBOL_GPL(lgdt3304_attach);
MODULE_AUTHOR("Markus Rechberger <mrechberger@empiatech.com>");
MODULE_DESCRIPTION("LGE LGDT3304 DVB-T demodulator driver");
MODULE_LICENSE("GPL");
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